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d1 = 15 + 7 = 22 cm
d2 = 9 + 9 = 18 cm
L = (d1 × d2)/2
L = (22 × 18)/2
L = 396/2
L = 198
26.
bagu jadi 2 bangun datar.
bangun 1 = trapesium siku2
bangun 2 = persegi panjang
bangun 1
sisi sejajarnya = 18 dan (24 - 18 = 6)
tinggi = 18 - 8 = 10
L = jumlah sisi sejajar × t / 2
L = (18 + 6) × 10/2
L = 24 × 10/2 = 120
bangun 2
panjang = 24
lebar = 8
L = p × l
L = 24 × 8 = 192
total luas = L.bangun 1 + L.bangun 2
total luas = 120 + 192 = 312
= 1/2 x (9cm+9cm) x (7cm+15cm)
= 1/2 x 18 cm x 22 cm
= 198 cm²
jawabannya : b.198cm²
26. luas bangun tersebut=luas persegi panjang + luas trapesium
= (24cm×8cm)+((18cm+(24cm-18cm))2×(18cm-8cm)
= (24cm×8cm)+((18cm+6cm)/2×10cm)
=(24cm×8cm)+(24cm/2×10cm)
=192cm²+120cm²
=312cm²
jawabannya :b.312cm²